TY - JOUR
T1 - Tribological properties of ta-CNx coating sliding against steel and sapphire in unlubricated condition
AU - Liu, Xiaoxu
AU - Umehara, Noritsugu
AU - Tokoroyama, Takayuki
AU - Murashima, Motoyuki
N1 - Funding Information:
The authors would like to thank Grant-in-Aid for Scientific Research ( 25220902 ) for the financial supports of this project. The corresponding author would also like to convey thanks to the China Scholarship Council for providing financial support to her graduate study.
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2019/3
Y1 - 2019/3
N2 - Tribo-behavior of tetrahedral amorphous carbon nitride (ta-CNx) coating in unlubricated condition was investigated in this study. Sliding against steel, low nitrogen content ta-CNx exhibits much lower friction and wear as temperature increases, with less adhesion wear than ta-C and remained relatively higher hardness (45.01 GPa). Nevertheless, against sapphire ta-C outperforms ta-CNx greatly, and graphitization could be found at 120 °C. With atmosphere humidity increasing, ta-CNx shows significantly decreased friction, implying the tribo-character of high sp3 bonding structure. Meanwhile, dry air seems to be the harshest condition for ta-CNx, since O2 in the atmosphere might lead to oxidized wear of ta-CNx even under room temperature. Furthermore, in humid N2, as an inert gas with high humidity, ta-CNx shows the lowest friction and wear.
AB - Tribo-behavior of tetrahedral amorphous carbon nitride (ta-CNx) coating in unlubricated condition was investigated in this study. Sliding against steel, low nitrogen content ta-CNx exhibits much lower friction and wear as temperature increases, with less adhesion wear than ta-C and remained relatively higher hardness (45.01 GPa). Nevertheless, against sapphire ta-C outperforms ta-CNx greatly, and graphitization could be found at 120 °C. With atmosphere humidity increasing, ta-CNx shows significantly decreased friction, implying the tribo-character of high sp3 bonding structure. Meanwhile, dry air seems to be the harshest condition for ta-CNx, since O2 in the atmosphere might lead to oxidized wear of ta-CNx even under room temperature. Furthermore, in humid N2, as an inert gas with high humidity, ta-CNx shows the lowest friction and wear.
KW - Gas atmosphere
KW - ta-CNx coating
KW - Temperature
KW - Tribological property
UR - http://www.scopus.com/inward/record.url?scp=85055495937&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85055495937&partnerID=8YFLogxK
U2 - 10.1016/j.triboint.2018.10.022
DO - 10.1016/j.triboint.2018.10.022
M3 - Article
AN - SCOPUS:85055495937
SN - 0301-679X
VL - 131
SP - 102
EP - 111
JO - Tribology International
JF - Tribology International
ER -